Wilson loop remainder function for null polygons in the limit of self-crossing

Details Wilson loop remainder function for null polygons in the limit of self-crossing Wilson loop remainder function for null polygons in the limit of self-crossing

2011-04-13

arxiv.org/abs/1104.2469v3

JHEP 1105:114,2011

Physics

High Energy Physics

High Energy Physics - Theory

12 pages, 2 figures, typos corrected, references added, note added

Scientific paper

10.1007/JHEP05(2011)114

The remainder function of Wilson loops for null polygons becomes divergent if two vertices approach each other. We apply RG techniques to the limiting configuration of a contour with self-intersection. As a result for the two loop remainder we find a quadratic divergence in the logarithm of the distance between the two approaching vertices. The divergence is multiplied by a factor, which is given by a pure number plus the product of two logarithms of cross-ratios characterising the conformal geometry of the self-crossing.

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